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- /* copdis - standalone copper list disassembler
- *
- * by Karl Lehenbauer, April 1989
- *
- * This code is released to the public domain for any legal use.
- *
- * This is free software. No warranties are expressed or implied.
- *
- *
- * There should be a text file, copdis.doc, that describes the function
- * of the program in greater detail. If you don't have it, you've been
- * ripped off!
- *
- * A quick summary: to disassemble a copper list, call copdis and pass it
- * the address of the start of the copper list. Note that this is not
- * the address of the cprlst or CopList data structure, but the actual
- * address of the first copper instruction.
- *
- * Some examples:
- *
- * GfxBase's copinit list, this may not be right
- * copdis(GfxBase->copinit);
- *
- * Top Viewport's display instructions for the "long frame"
- * copdis(GfxBase->ActiView->ViewPort->DspIns->CopLStart);
- *
- * Top Viewport's display instructions for the "short frame"
- * copdis(GfxBase->ActiView->ViewPort->DspIns->CopSStart);
- *
- * Currently active LOF copper list
- * copdis(GfxBase->ActiView->LOFCprList->start);
- *
- * Currently active SHF copper list:
- * copdis(GfxBase->ActiView->SHFCprList->start);
- *
- */
-
- #include <functions.h>
- #include <stdio.h>
-
- struct copregstruct
- {
- char *regname;
- char *longname;
- short regid;
- short flags;
- };
-
- struct copinstruction
- {
- short ir1;
- short ir2;
- };
-
- #define COLOR 1
-
- static struct copregstruct copregisters[] =
- {
- {"bltddat","blitter destination early read (dummy address)",0,0},
- {"dmaconr","DMA control (and blitter status) read",0x2,0},
- {"vposr","read vert most signif. bit (and frame flop)",0x4,0},
- {"vhposr","read vert and horiz. position of beam",0x6,0},
- {"dskdatr","disk data early read (dummy address)",0x8,0},
- {"joy0dat","joystick-mouse 0 data (vert,horiz)",0xa,0},
- {"joy1dat","joystick-mouse 1 data (vert,horiz)",0xc,0},
- {"clxdat","collision data (read and clear)",0xe,0},
- {"adkconr","audio, disk control register read",0x10,0},
- {"pot0dat","pot counter pair 0 data (vert,horiz)",0x12,0},
- {"pot1dat","pot counter pair 1 data (vert,horiz)",0x14,0},
- {"potgor","pot port data read",0x16,0},
- {"serdatr","serial port data and status read",0x18,0},
- {"dskbytr","disk data byte and status read",0x1a,0},
- {"intenar","interrupt enable bits read",0x1c,0},
- {"intreqr","interrupt request bits read",0x1e,0},
-
- {"dskpth","disk pointer (high 3 bits)",0x20,0},
- {"dskptl","disk pointer (low 15 bits)",0x22,0},
- {"dsklen","disk length",0x24,0},
- {"dskdat","disk DMA data write",0x26,0},
-
- {"refptr","refresh pointer",0x28,0},
- {"vposw","write vert most signif. bit (and frame flop)",0x2a,0},
- {"vhposw","write vert and horiz position of beam",0x2c,0},
- {"copcon","copper control register (CDANG)",0x2e,0},
- {"serdat","serial port data and stop bits write",0x30,0},
- {"serper","serial port period and control",0x32,0},
- {"potgo","pot port data write and start",0x34,0},
- {"joytest","write all four joystick-mouse counters",0x36,0},
- {"strequ","strobe for horiz sync with vertical blank and EQU",0x38,0},
- {"strvbl","strobe for horiz sync with vertical blank",0x3a,0},
- {"strhor","strobe for horizontal sync",0x3c,0},
- {"strlong","strobe for identification of long horiz. line",0x3e,0},
-
- {"bltcon0","blitter control register 0",0x40,0},
- {"bltcon1","blitter control register 1",0x42,0},
- {"bltafwm","blitter first word mask for source A",0x44,0},
- {"bltalwm","blitter last word mask for source A",0x46,0},
- {"bltcpth","blitter pointer to source C (high 3 bits)",0x48,0},
- {"bltcptl","blitter pointer to source C (low 15 bits)",0x4a,0},
- {"bltbpth","blitter pointer to source B (high 3 bits)",0x4c,0},
- {"bltbptl","blitter pointer to source B (low 15 bits)",0x4e,0},
- {"bltapth","blitter pointer to source A (high 3 bits)",0x50,0},
- {"bltaptl","blitter pointer to source A (low 15 bits)",0x52,0},
- {"bltdpth","blitter pointer to source D (high 3 bits)",0x54,0},
- {"bltdptl","blitter pointer to source D (low 15 bits)",0x56,0},
- {"bltsize","blitter start and size (window width, height)",0x58,0},
- {"bltcmod","blitter modulo for source C",0x60,0},
- {"bltbmod","blitter modulo for source B",0x62,0},
- {"bltamod","blitter modulo for source A",0x64,0},
- {"bltdmod","blitter modulo for source D",0x66,0},
- {"bltcdat","blitter source C data",0x70,0},
- {"bltbdat","blitter source B data",0x72,0},
- {"bltadat","blitter source A data",0x74,0},
-
- {"dsksync","disk sync pattern for disk read",0x7e,0},
-
- {"cop1lch","copper first location (high 3 bits)",0x80,0},
- {"cop1lcl","copper first location (low 15 bits)",0x82,0},
- {"cop2lch","copper second location (high 3 bits)",0x84,0},
- {"cop2lcl","copper second location (low 15 bits)",0x86,0},
- {"copjmp1","restart copper at first location",0x88,0},
- {"copjmp2","restart copper at second location",0x8a,0},
- {"copins","copper instruction fetch identify",0x8c,0},
- {"diwstrt","display window start (upper left vert-horiz position)",0x8e,0},
- {"diwstop","display window stop (lower right vert-horiz position)",0x90,0},
- {"ddfstrt","display bit plane data fetch start (horiz. position)",0x92,0},
- {"ddfstop","display bit plane data fetch stop (horiz. position)",0x94,0},
- {"dmacon","DMA control write (clear or set)",0x96,0},
- {"clxcon","collision control",0x98,0},
- {"intena","interrupt enable bits",0x9a,0},
- {"intreq","interrupt request bits",0x9c,0},
- {"adkcon","audio, disk, UART control",0x9e,0},
-
- {"aud0lch","audio channel 0 location (high 3 bits)",0xa0,0},
- {"aud0lcl","audio channel 0 location (low 15 bits)",0xa2,0},
- {"aud0len","audio channel 0 length",0xa4,0},
- {"aud0per","audio channel 0 period",0xa6,0},
- {"aud0vol","audio channel 0 volume",0xa8,0},
- {"aud0dat","audio channel 0 data",0xaa,0},
-
- {"aud1lch","audio channel 1 location (high 3 bits)",0xb0,0},
- {"aud1lcl","audio channel 1 location (low 15 bits)",0xb2,0},
- {"aud1len","audio channel 1 length",0xb4,0},
- {"aud1per","audio channel 1 period",0xb6,0},
- {"aud1vol","audio channel 1 volume",0xb8,0},
- {"aud1dat","audio channel 1 data",0xba,0},
-
- {"aud2lch","audio channel 2 location (high 3 bits)",0xc0,0},
- {"aud2lcl","audio channel 2 location (low 15 bits)",0xc2,0},
- {"aud2len","audio channel 2 length",0xc4,0},
- {"aud2per","audio channel 2 period",0xc6,0},
- {"aud2vol","audio channel 2 volume",0xc8,0},
- {"aud2dat","audio channel 2 data",0xca,0},
-
- {"aud3lch","audio channel 3 location (high 3 bits)",0xd0,0},
- {"aud3lcl","audio channel 3 location (low 15 bits)",0xd2,0},
- {"aud3len","audio channel 3 length",0xd4,0},
- {"aud3per","audio channel 3 period",0xd6,0},
- {"aud3vol","audio channel 3 volume",0xd8,0},
- {"aud3dat","audio channel 3 data",0xda,0},
-
- {"bpl1pth","blitter plane 1 pointer (high 3 bits)",0xe0,0},
- {"bpl1ptl","blitter plane 1 pointer (low 15 bits)",0xe2,0},
- {"bpl2pth","blitter plane 2 pointer (high 3 bits)",0xe4,0},
- {"bpl2ptl","blitter plane 2 pointer (low 15 bits)",0xe6,0},
- {"bpl3pth","blitter plane 3 pointer (high 3 bits)",0xe8,0},
- {"bpl3ptl","blitter plane 3 pointer (low 15 bits)",0xea,0},
- {"bpl4pth","blitter plane 4 pointer (high 3 bits)",0xec,0},
- {"bpl4ptl","blitter plane 4 pointer (low 15 bits)",0xee,0},
- {"bpl5pth","blitter plane 5 pointer (high 3 bits)",0xf0,0},
- {"bpl5ptl","blitter plane 5 pointer (low 15 bits)",0xf2,0},
- {"bpl6pth","blitter plane 6 pointer (high 3 bits)",0xf4,0},
- {"bpl6ptl","blitter plane 6 pointer (low 15 bits)",0xf6,0},
-
- {"bplcon0","bit plane control bits",0x100,0},
- {"bplcon1","bit plane scroll values for PF1 & PF2",0x102,0},
- {"bplcon2","bit plane priority control",0x104,0},
-
- {"bpl1mod","bit plane modulo for odd planes",0x108,0},
- {"bpl2mod","bit plane modulo for even planes",0x10a,0},
-
- {"bpl1dat","bit plane 1 data (parallel-to-serial convert)",0x110,0},
- {"bpl2dat","bit plane 2 data (parallel-to-serial convert)",0x112,0},
- {"bpl3dat","bit plane 3 data (parallel-to-serial convert)",0x114,0},
- {"bpl4dat","bit plane 4 data (parallel-to-serial convert)",0x116,0},
- {"bpl5dat","bit plane 5 data (parallel-to-serial convert)",0x118,0},
- {"bpl6dat","bit plane 6 data (parallel-to-serial convert)",0x11a,0},
-
- {"spr0pth","sprite 0 pointer (high 3 bits)",0x120,0},
- {"spr0ptl","sprite 0 pointer (low 15 bits)",0x122,0},
- {"spr1pth","sprite 1 pointer (high 3 bits)",0x124,0},
- {"spr1ptl","sprite 1 pointer (low 15 bits)",0x126,0},
- {"spr2pth","sprite 2 pointer (high 3 bits)",0x128,0},
- {"spr2ptl","sprite 2 pointer (low 15 bits)",0x12a,0},
- {"spr3pth","sprite 3 pointer (high 3 bits)",0x12c,0},
- {"spr3ptl","sprite 3 pointer (low 15 bits)",0x12e,0},
- {"spr4pth","sprite 4 pointer (high 3 bits)",0x130,0},
- {"spr4ptl","sprite 4 pointer (low 15 bits)",0x132,0},
- {"spr5pth","sprite 5 pointer (high 3 bits)",0x134,0},
- {"spr5ptl","sprite 5 pointer (low 15 bits)",0x136,0},
- {"spr6pth","sprite 6 pointer (high 3 bits)",0x138,0},
- {"spr6ptl","sprite 6 pointer (low 15 bits)",0x13a,0},
- {"spr7pth","sprite 7 pointer (high 3 bits)",0x13c,0},
- {"spr7ptl","sprite 7 pointer (low 15 bits)",0x13e,0},
-
- {"spr0pos","sprite 0 vert-horiz start position",0x140,0},
- {"spr0ctl","sprite 0 vert stop position and control data",0x142,0},
- {"spr0data","sprite 0 image data register A",0x144,0},
- {"spr0datb","sprite 0 image data register B",0x146,0},
- {"spr1pos","sprite 1 vert-horiz start position",0x148,0},
- {"spr1ctl","sprite 1 vert stop position and control data",0x14a,0},
- {"spr1data","sprite 1 image data register A",0x14c,0},
- {"spr1datb","sprite 1 image data register B",0x14e,0},
- {"spr2pos","sprite 2 vert-horiz start position",0x150,0},
- {"spr2ctl","sprite 2 vert stop position and control data",0x152,0},
- {"spr2data","sprite 2 image data register A",0x154,0},
- {"spr2datb","sprite 2 image data register B",0x156,0},
- {"spr3pos","sprite 3 vert-horiz start position",0x158,0},
- {"spr3ctl","sprite 3 vert stop position and control data",0x15a,0},
- {"spr3data","sprite 3 image data register A",0x15c,0},
- {"spr3datb","sprite 3 image data register B",0x15e,0},
- {"spr4pos","sprite 4 vert-horiz start position",0x160,0},
- {"spr4ctl","sprite 4 vert stop position and control data",0x162,0},
- {"spr4data","sprite 4 image data register A",0x164,0},
- {"spr4datb","sprite 4 image data register B",0x166,0},
- {"spr5pos","sprite 5 vert-horiz start position",0x168,0},
- {"spr5ctl","sprite 5 vert stop position and control data",0x16a,0},
- {"spr5data","sprite 5 image data register A",0x16c,0},
- {"spr5datb","sprite 5 image data register B",0x16e,0},
- {"spr6pos","sprite 6 vert-horiz start position",0x170,0},
- {"spr6ctl","sprite 6 vert stop position and control data",0x172,0},
- {"spr6data","sprite 6 image data register A",0x174,0},
- {"spr6datb","sprite 6 image data register B",0x176,0},
- {"spr7pos","sprite 7 vert-horiz start position",0x178,0},
- {"spr7ctl","sprite 7 vert stop position and control data",0x17a,0},
- {"spr7data","sprite 7 image data register A",0x17c,0},
- {"spr7datb","sprite 7 image data register B",0x17e,0},
-
- {"color0","",0x180,COLOR},
- {"color1","",0x182,COLOR},
- {"color2","",0x184,COLOR},
- {"color3","",0x186,COLOR},
- {"color4","",0x188,COLOR},
- {"color5","",0x18a,COLOR},
- {"color6","",0x18c,COLOR},
- {"color7","",0x18e,COLOR},
- {"color8","",0x190,COLOR},
- {"color9","",0x192,COLOR},
- {"color10","",0x194,COLOR},
- {"color11","",0x196,COLOR},
- {"color12","",0x198,COLOR},
- {"color13","",0x19a,COLOR},
- {"color14","",0x19c,COLOR},
- {"color15","",0x19e,COLOR},
- {"color16","",0x1a0,COLOR},
- {"color17","",0x1a2,COLOR},
- {"color18","",0x1a4,COLOR},
- {"color19","",0x1a6,COLOR},
- {"color20","",0x1a8,COLOR},
- {"color21","",0x1aa,COLOR},
- {"color22","",0x1ac,COLOR},
- {"color23","",0x1ae,COLOR},
- {"color24","",0x1b0,COLOR},
- {"color25","",0x1b2,COLOR},
- {"color26","",0x1b4,COLOR},
- {"color27","",0x1b6,COLOR},
- {"color28","",0x1b8,COLOR},
- {"color29","",0x1ba,COLOR},
- {"color30","",0x1bc,COLOR},
- {"color31","",0x1be,COLOR},
- {"","",-1,0}
- };
-
- struct copregstruct *find_copper_register_info(reg)
- int reg;
- {
- struct copregstruct *regp;
-
- for (regp = &copregisters[0]; regp->regid != -1; regp++)
- {
- if (regp->regid == reg)
- return(regp);
- }
- return(0);
- }
-
- disassemble_copper_instruction(ip)
- struct copinstruction *ip;
- {
- short vp, hp, ve, he, bfd;
- int registerid;
- struct copregstruct *regp;
- char *regtext, *longtext;
-
- /* printf("instruction %x, %x\n",ip->ir1,ip->ir2); */
-
-
- /* true if it's a branch or skip instruction */
- if (ip->ir1 & 1)
- {
- /* branch or skip instruction */
-
- /* calculate vertical and horizontal position */
- vp = (ip->ir1 >> 8) & 0xff;
- hp = (ip->ir1 >> 1) & 0x7f;
-
- /* calculate vertical and horizontal position compare bits
- * and blitter-finished-disable bit */
- ve = (ip->ir2 >> 8) & 0x7f;
- he = (ip->ir2 >> 1) & 0x7f;
- bfd = (ip->ir2 & 0x8000);
-
- /* print the instruction type, check bit 0 of second word */
- if (ip->ir2 & 1)
- {
- /* it's a skip */
- printf("\tskip");
- }
- else
- {
- /* it's a wait */
- printf("\twait");
- }
-
- /* reverse sense of blitter finish wait disable to show blitter
- * finish wait -- that way we occasionally say "blitter" instead
- * of almost always saying "no blitter"
- */
- if (!bfd)
- printf("\tbf,");
- else
- printf("\t");
-
- /* print vertical and horizontal position */
- printf("vpos=%d,hpos=%d",vp,hp);
- printf("instruction %x, %x\n",ip->ir1,ip->ir2);
-
- /* if enable masks are not basically "all", print them */
- if ((ve != 0x7f) || (he != 0x7f))
- {
- printf(",vcomp=%d,hcomp=%d\n",ve,he);
- }
- }
- else
- {
- /* it's a move instruction */
-
- /* calculate register ID and look it up */
- registerid = ip->ir1 & 0x1ff;
- regp = find_copper_register_info(registerid);
-
- /* if we found the register in our table, print the text
- * else whine about something we don't understand */
- if (regp)
- {
- regtext = regp->regname;
- longtext = regp->longname;
- }
- else
- {
- regtext = "UNKNOWN_OPCODE";
- longtext = "";
- }
- printf("\tmove\t%x,%s",ip->ir2,regtext);
-
- if (*longtext != '\0')
- printf("\t;%s",longtext);
- }
- printf("\n");
- }
-
- /* have a go at disassembling a copper list */
- copdis(coplist)
- struct copinstruction *coplist;
- {
-
- /* check and refuse null list pointers */
- if (coplist == (struct copinstruction *)NULL)
- {
- fprintf(stderr,"copdis: copper list pointer is null\n");
- return;
- }
-
- /* while we don't have an instruction of 0xffff 0xfffe, which is
- * a de facto END PROGRAM instruction, print instructions.
- *
- * Use of do-while is in order that the END instruction is also
- * disassembled.
- *
- * This should really have a sanity check (like no more than a few
- * hundred instructions, and/or a length -- heck, it's in the cprlst
- * and CopList structures anyway), but it doesn't, or at least not
- * yet
- */
- do
- {
- disassemble_copper_instruction(coplist++);
- }
- while ((coplist->ir1 != 0xffff) && (coplist->ir2 != 0xfffe));
-
- /* and disassemble the WAIT 255 instruction */
- disassemble_copper_instruction(coplist);
- }
-
-